Pics are coming soon. The water is nearly completely clear. The issue was that I had to do a small change in the substrate (this is what I found out). The water formed a layer of protein on the top and the "dust" from the new aragonite sand got stuck in that protein film. Today, is the first day that I can see all the clams all the way.
Uh, I do have a Derasa, I think it's actually a thick tiger stripe (came out of my neighbors tank). The thing is about 1.5 inches, LOL. Just small. I have a frequent turnover of clams though. I guess you can say that I "rescue" them and bring them back to health. Plus, I occasionally will get offspring as well. Just those ones that sometimes are in tanks that have pinched mantle or are gapeing or what have you - I will buy those and help em'.
Clams are just something where I care a great deal about their health.